Henry deeany



UNITED STATES PATENT @rrica HENRY DREANY, OF

SUDBURY, CANADA.

EXPLOSHIEU EPECIFIGATION forming part of LettersPatent No. 750,175, dated January 19, 1904.

Application filecl December 22, 1902.

Serial No. 136,272. (No specimens.)

7 Be it known that I, HENRY l)REANY, manufacturer, of the town of Sudbury, in the dis- To aZZ whom, it may concern: I

trict of N ipissing, Province of Ontario, Canada, have invented certain new and useful Improvements in Explosives for all Blasting Purposes, of which the followingis aspecification. l

The object of my invention is to produce an I explosivewhich is uniform in action whether wet or dry and can be operated with safety without giving ofi noxious fumes and whose action may be readily controlled; and it consists, essentially, of the following ingredients mixed in the manner hereinafter indicated: Nitroglycerin, oil of mil-bane, and petrolatum, a by-product of petroleum, are mixed, preferably, in the proportion, by weight, of twelve and one-half per cent. of oil of mirbane, twelve and one-half per cent. of petrolatum, and seventy-five per cent. of nitroglycerin to form the explosive. This compound may be reduced in strength in the usual manner for different classes of work by the addition of nitrate of soda and wood-pulp in varying quantities. The preferable proportions of the reducer may be half as much again in weight of nitrate of soda and one-third in Weight of wood-pulp with relation to the weight of nitroglycerin employed. The proportion of the oils of mirbane and petrolatum may be varied so as to form ten per cent. in weight of each to fifteen per cent. of each with eighty and seventy per cent. of nitroglycerin, respectively, in order to suit the character of the rock.

The following mode of mixing gives the best results: The petrolatum and nitroglycerin are first mixed together at a temperature of from 100 to 110 Fahrenheit. Then the oil of mirbane is added at the same temperature, and while the foregoing mixture retains the said temperature it is mixed with the proper quantity of nitrate of soda and wood-pulp for modifying the action of the/explosive, as before referred to. By this method of mixing all precipitation or leakage from the compound is obviated. By mixing the nitroglycerin with the oil of mirbane and pctrolatum, as indicated, the nitroglycerin is held in suspension by the oils in such a manner as to render it absolutely safe to handle, and it can only be exploded by a detonating-cap. Heat or fire, concussion, shock, or friction will not by themselves cause an explosion of the compound; but there must be the simultaneous action of concussion, heat, and flame to efiect the explosion.

By raising the quantities of oil of mirbane and petrolatum by about onefourth' in weight and reducing the nitroglycerin by about onetenth in weight and retaining the same amount of nitrate of soda and wood-pulp for reducer I obtain a mixture suitable for overgroundwork in loose material or easily-broker rock, which explosive may be still further weakened by reducing the quantity of nitroglycerin, oil of mirbane, and 'petrolatum and increasing the quantity of the reducing agent.

By the addition of suitable quantities of the oil of mirbane and of pctrolatum the action of the nitroglycerin can be controlled at the will of the operator and be made suitable for any class of rockwork, and the explosive may be made slow or quick acting, as desired.

This new explosive is uniform in action whether it is wet or dry and whether immersed in water or not. It is absolutely weatherproof and frostproof, does notdeteriorate with age or give off noxious fumes on explosion.

The change ir proportions of the ingredients hereinbefore referred to does not in any way affect any of the characteristics of the explosive already set out.

I find that any of the hydrocarbon by-products of the distillation of petroleum may be employed in my compound, yet the pctrolatum is preferable, as the lighter l),\'-1)l'()(ll1CtS are liable to evaporate or else contain impurities.

What I claim as my invention is 1. An explosive compound consisting of a mixture of from seventy to eighty per cent.

of nitroglycerin, ten to fifteen per cent. of oil .mix ing from ten to fifteen per cent. (by W of mirbane and from ten to fifteen per cent. Weight) of oil of mirbane at about the same of petrolatum. temperature, substantially as descri ed.

3. She procegs of preparing an elxplgsive Sudbury, Ontario, December 17,1902.

W ic consists rst in mixing toget1er ro'm seventy to eighty per cent. (by Weight) of ni- 'HENRY DREANY' troglycerin and from ten to fifteen per cent. Witnesses:

(by Weight) of petrolatum at a temperature of JESSIE WILKINSON,

{ m 100 to 110, Fahrenheit, and second, A. 'D. MELDRUM. 

